feat(deps): bump golang.org/x/sync from 0.3.0 to 0.4.0 (#4353)

Bumps [golang.org/x/sync](https://github.com/golang/sync) from 0.3.0 to
0.4.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="22ba2078e1"><code>22ba207</code></a>
singleflight: add panicError.Unwrap method</li>
<li>See full diff in <a
href="https://github.com/golang/sync/compare/v0.3.0...v0.4.0">compare
view</a></li>
</ul>
</details>
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go.mod

@@ -48,7 +48,7 @@ require (
 	gocloud.dev v0.34.0
 	golang.org/x/crypto v0.13.0
 	golang.org/x/oauth2 v0.12.0
-	golang.org/x/sync v0.3.0
+	golang.org/x/sync v0.4.0
 	golang.org/x/text v0.13.0
 	golang.org/x/tools v0.13.0
 	gopkg.in/mail.v2 v2.3.1

go.sum

@@ -1045,8 +1045,8 @@ golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sync v0.4.0 h1:zxkM55ReGkDlKSM+Fu41A+zmbZuaPVbGMzvvdUPznYQ=
+golang.org/x/sync v0.4.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=